Indoor Units - Mitsubishi Heavy Industries SRK20ZJX-S Service Manual

CNB Z Connector
DM Drain motor
F200 203 Fuse
FM Fan motor
I
FS Float switch
LED 2 Indication lamp
Green-Normal operation
Connecting line between
indoor unit and outdoor unit
1
Power source line 1 2
2
Signal line
3
3
Earth
TB1
Notes 1. indicates wiring on site.
2. TB1 is the terminal block for heavy current connecting line between
indoor unit and outdoor unit ,
and TB2 is the terminal block for weak current remote controller .
3. See the wiring diagram of outside unit about the line between
inside unit and outside unit.
2
4. Use twin core cable 0.3mm X2 at remote controller line. See spec
sheet of remote controller in case that the total length is more than 100m.
5. Do not put remote controller line alongside power source line.
LED 3 Indication lamp Red-Inspection
LM1 4 Louver motor
SW2 Remote controller communication
address
SW5 Plural units Master Slave setting
SW6 Model capacity setting
SW7-1 Operation check,Drain motor test run
Remote controller
TB2
WH
X X
BK
Th t°
Y Y
C
Y GN
Y GN Y GN
Power PCB
Y GN
CNW2
Y GN 7
F200 3.15A
RD
RD 5
Power circuit
WH 3
F201 3.15A CNW1
BL 1
BL
CNW0
X4
Y GN
WH
F203 F202
0.16A 1.0A
1 3 1 4 5 6 7
CNR CNM
RD BL BR OR WH
WH BR
WH WH
2 1
CNR2
5 6 4 3 2
CNM3
BL
Y Y
RD
RD BL BR OR WH
M
5 6 4 3 2
DM CNM4
1
RD BL BR OR WH
WH
M
FM
I
TB1 Terminal block Power source
mark
TB2 Terminal block Signal line
Thc Thermistor Remote controller
Th -A Thermistor Return air
I
Th -R1,2,3 Thermistor Heat exchanger
I
X4 Relay for DM
mark Closed-end connector
Control PCB
CNB
1
CNI
WH
3
BL
LED 2 LED 3
CNH
BK
RD
1 1
RD
2 2
CNW3
SW2
RD
3 3
RD
RD
4 4
RD
5 5
BL
1 2
SW5
BL
2
1
CNW4
3 BL CNN
3
BL
SW6
4 BL
Y
4
5 BL
5
SW7
BK BK
1 1
LM1 1
2 BK 2 BK
2
M 3 BK 3 BK
3
4 BK 4 BK
4
5 BK 5 BK
5
1 BK 6 BK
LM2 6
2 BK 7 BK
7
3 BK 8 BK
M
8
+12
4 BK 9 BK
9
CNJ
BK BK
5 10 CNT
10
1 BK 11 BK WH
BL
LM3 11
2 BK 12 BK
12
3 BK 13 BK
M
13
4 BK 14 BK
14
5 BK 15 BK
15
1 BK 16 BK
LM4 16
2 BK BK 17 BK BK
17
M 3 BK 18 BK
18
BK BK
4 19
19
5 BK 20 BK
20
CNJ2
WH
Color Marks
Mark Color
BK Black
mark BL Blue
BR Brown
OR Orange
RD Red
WH White
Y Yellow
Y GN Yellow Green
FS
WH 1 WH 1 RD
1
WH 2 WH 2 RD
2
CNI2
WH
BL 3 BL 1 BK
1
Th -A
t°
I
BL 4 BL 2 BK
2
CNH2
WH
RD 5 RD 1 BK
1
Th -R1
t°
I
RD 6 RD 2 BK
2
Y 7 Y 3 BK
3
Th -R2
t°
I
Y 8 Y 4 BK
4
BK 9 BK 5 BK
5
Th -R3
t° I
BK 10 BK 6 BK
6
CNC CNN2
BK
WH
Option
1
XR1
2
XR2
3
XR3
4
XR4
5
6
XR5 Remote operation input:volt-free contact